package com.atguigu.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.springcloud.alibaba.service.PaymentFeignService;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author xiaolong
 * @version 1.0
 * @description: TODO
 * @date 2021/10/7 20:13
 */
@RestController
@Slf4j
public class CircleBreakerController {

    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
//    @SentinelResource(value = "fallback")  //没有配置
//    @SentinelResource(value = "fallback",fallback = "handlerFallback")  //fallback只负责业务异常
//    @SentinelResource(value = "testHotKey",blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
    @SentinelResource(value = "testHotKey", fallback = "handlerFallback", blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class}) //exceptionsToIgnore 不走兜底异常，页面会报错
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);

        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常....");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException,该ID没有对应的记录，空指针异常");
        }
        return result;
    }

    //本例是fallback
    public CommonResult handlerFallback(@PathVariable Long id, Throwable e) {
        Payment payment = new Payment(id, "null");
        return new CommonResult(444, "兜底异常handlerFallback，exception内容" + e.getMessage(), payment);
    }

    //blockHandler只负责sentinel控制台配置违规
    public CommonResult blockHandler(@PathVariable Long id, BlockException blockException) {
        Payment payment = new Payment(id, "null");
        return new CommonResult(445, "blockHandler-sentinel限流，" + blockException.getMessage(), new Payment(2020L, "serial002"));
    }


    @Resource
    private PaymentFeignService paymentFeignService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentFeignService.getPaymentById(id);
    }
}
